Another collection of evidence has hit the court file in the Apple-Samsung case, underscoring what was discussed in the day’s proceedings about consumers’ views of mobile devices.

Among the documents: a study in which Samsung learned that its early advertising for its Galaxy Tab device was mistaken for Apple’s iPad.

In one survey, which was prepared in a first quarter 2011 presentation and stamped “effective” in May of that year, nearly half of consumers mistook the Galaxy Tab for the iPad. Some 18% identified the device correctly.

Timothy Benner, a consumer researcher for Samsung, said that the reaction was somewhat expected for a new entrant.

“The iPad had been firmly in the marketplace,” he said during the trial, and anyone looking at a tablet would likely automatically assume it was an iPad at first.

Samsung’s surveys also suggested customers are not particularly enthused about its technology. In the first quarter of 2010, 15% of smartphone owners surveyed by Samsung said they believed the Korean tech giant’s devices had the most advanced technology. A year later, that number only rose to 17%.

The most dramatic shift in the surveys were Samsung “phones that meet my expectations,” which rose from 33% in the first quarter of 2010 to 40% a year later. Samsung being “on its way up and has a lot going for it,” also rose 7 percentage points from 25% to 32% over the same period.

The one perception that didn’t change? “Well ahead of the rest,” which was stagnant at 19%.

Perhaps more concerning for Samsung was reaction that more customers didn’t want to buy the Galaxy Tab 2 than its original. In a survey for that Q1 2011 presentation, Samsung found 47% of respondents would probably or definitely buy the Galaxy Tab, while 43% said they’d do so for the Galaxy Tab 2–the next generation device. Some 3% said they definitely would not buy the Galaxy Tab, compared to 8% for the Galaxy Tab 2–though Samsung notes that nearly two-thirds of those respondents weren’t interested in a tablet computer anyway.

One last little bit of insight comes from Apple’s own market research. The January 2011 survey, conducted just before the iPhone was made available on the Verizon Wireless network in the U.S. for the first time, looked at why customers chose a phone made using Google’s Android mobile operating system instead of an iPhone.

Nearly half of respondents said they wanted to stay with their carrier, meaning they weren’t on AT&T–then the exclusive U.S. carrier–and weren’t willing to budge. More than a third said they trusted the Google brand.

According to the survey, 30% of respondents said they preferred a larger screen, something Apple is expected to address with the upcoming new iPhone this fall. Roughly a quarter said they either wanted “the latest and greatest smartphone” or simply “the latest technology.”